<template>
	<el-form size="large" ref="ruleFormRef" :model="ruleForm" class="login-content-form" :rules="loginRules">
		<el-form-item class="login-animation1" prop="userName">
			<el-input text placeholder="请输入用户名" v-model="ruleForm.username" clearable autocomplete="off">
				<template #prefix>
					<el-icon class="el-input__icon"><ele-User /></el-icon>
				</template>
			</el-input>
		</el-form-item>
		<el-form-item class="login-animation2" prop="password">
			<el-input :type="state.isShowPassword ? 'text' : 'password'" placeholder="请输入密码" v-model="ruleForm.password" autocomplete="off">
				<template #prefix>
					<el-icon class="el-input__icon"><ele-Unlock /></el-icon>
				</template>
				<template #suffix>
					<i
						class="iconfont el-input__icon login-content-password"
						:class="state.isShowPassword ? 'icon-yincangmima' : 'icon-xianshimima'"
						@click="state.isShowPassword = !state.isShowPassword"
					>
					</i>
				</template>
			</el-input>
		</el-form-item>
		<el-form-item class="login-animation2">
			<div class="flex-between login-option">
				<div>
					<span>是否记住我：</span>
					<el-switch
						v-model="state.checked"
						inline-prompt
						active-text="是"
						inactive-text="否"
					/>
				</div>
				<span class="forgetpwd">忘记密码？</span>
			</div>
		</el-form-item>
		<el-form-item class="login-animation4">
			<el-button type="primary" class="login-content-submit" round v-waves @click="onSignIn(ruleFormRef)" :loading="state.loading.signIn">
				<span>登 录</span>
			</el-button>
		</el-form-item>
		<div class="font12 mt30 login-animation4 login-msg">
			* 温馨提示：建议使用谷歌、Microsoft Edge，版本 79.0.1072.62 及以上浏览器，360浏览器请使用极速模式
		</div>
	</el-form>
</template>

<script setup lang="ts" name="loginAccount">
import { reactive, computed, ref, onBeforeMount } from 'vue';
import { useRoute, useRouter } from 'vue-router';
import { ElMessage } from 'element-plus';
import type { FormInstance, FormRules } from 'element-plus'
import Cookies from 'js-cookie';
import { Base64 } from 'js-base64';
import { initFrontEndControlRoutes } from '/@/router/frontEnd';
import { Session } from '/@/utils/storage';
import { formatAxis } from '/@/utils/formatTime';
import { NextLoading } from '/@/utils/loading';
import { useLoginApi } from '/@/api/login'
import other from '/@/utils/other';

// 定义变量内容
const route = useRoute();
const router = useRouter();
const state = reactive({
	isShowPassword: false,
	loading: {
		signIn: false,
	},
	checked: false
});
const ruleFormRef = ref<FormInstance>()
const ruleForm = reactive({
	username: '',
	password: '',
});
const loginRules = reactive<FormRules>({
	username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 5, max: 20, message: '请输入用户名5-20位字符', trigger: 'blur' },
  ],
	password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 5, max: 20, message: '请输入密码 5-20位字符', trigger: 'blur' },
  ],
})

// 时间获取
const currentTime = computed(() => {
	return formatAxis(new Date());
});

// 页面加载前
onBeforeMount(() => {
	let username = localStorage.getItem('username') || ''
	if (username) {
		ruleForm.username = username
		ruleForm.password = Base64.decode(localStorage.getItem('password')); // base64解密
		state.checked = true
	}
});

// 登录, 防抖
const onSignIn = (formEl: FormInstance | undefined) => {
  if (!formEl) return
	other.debounce(async () => {
		await formEl.validate(async (valid, fields) => {
    if (valid) {
      state.loading.signIn = true;
			if(state.checked) {
				let password = Base64.encode(ruleForm.password) // base64加密
				localStorage.setItem('username', ruleForm.username)
				localStorage.setItem('password', password)
			} else {
				localStorage.removeItem('userName')
        localStorage.removeItem('password')
			}
			useLoginApi().signIn(ruleForm).then(async (res) => {
					// 存储 token 到浏览器缓存
					Session.set('token', res.access_token);
					Cookies.set('userName', ruleForm.username);
					const isNoPower = await initFrontEndControlRoutes();
					signInSuccess(isNoPower);
					state.loading.signIn = false;
			}).catch((e) => {
				state.loading.signIn = false;
			})
    } else {
			state.loading.signIn = false;
      console.log('error submit!', fields)
    }
  })
	}, 3000)
}
// 登录成功后的跳转
const signInSuccess = (isNoPower: boolean | undefined) => {
	if (isNoPower) {
		ElMessage.warning('抱歉，您没有登录权限');
		Session.clear();
	} else {
		// 初始化登录成功时间问候语
		let currentTimeInfo = currentTime.value;
		// 登录成功，跳到转首页
		// 如果是复制粘贴的路径，非首页/登录页，那么登录成功后重定向到对应的路径中
		if (route.query?.redirect) {
			router.push({
				path: <string>route.query?.redirect,
				query: Object.keys(<string>route.query?.params).length > 0 ? JSON.parse(<string>route.query?.params) : '',
			});
		} else {
			router.push('/');
		}
		// 登录成功提示
		ElMessage.success(`${currentTimeInfo}，欢迎回来！`);
		// 添加 loading，防止第一次进入界面时出现短暂空白
		NextLoading.start();
	}
	state.loading.signIn = false;
};
</script>

<style scoped lang="scss">
.login-content-form {
	margin-top: 20px;
	@for $i from 1 through 4 {
		.login-animation#{$i} {
			opacity: 0;
			animation-name: error-num;
			animation-duration: 0.5s;
			animation-fill-mode: forwards;
			animation-delay: calc($i/10) + s;
		}
	}
	.login-content-password {
		display: inline-block;
		width: 20px;
		cursor: pointer;
		&:hover {
			color: #909399;
		}
	}
	.login-content-code {
		width: 100%;
		padding: 0;
		font-weight: bold;
		letter-spacing: 5px;
	}
	.login-content-submit {
		width: 100%;
		letter-spacing: 2px;
		font-weight: 300;
		margin-top: 15px;
	}
	.login-msg {
		color: var(--el-text-color-placeholder);
	}
}
.login-option {
	width: 100%;
}
.forgetpwd {
	color: var(--el-color-primary);
	cursor: pointer;
}
</style>
